I've seen abandoned towns. Ghost towns. I've seen towns convinced there were demons outside, but a - malevolent demon was convincing them that anyone on the outside was a demon. I've been trapped in a fake world. Twice. Second time I didn't know it. Had to learn what happened from my brother. I've been inside people's heads. Nothing I've seen would rule it out.

( But. No, he hasn't seen anything like that. )